Serwis Infona wykorzystuje pliki cookies (ciasteczka). Są to wartości tekstowe, zapamiętywane przez przeglądarkę na urządzeniu użytkownika. Nasz serwis ma dostęp do tych wartości oraz wykorzystuje je do zapamiętania danych dotyczących użytkownika, takich jak np. ustawienia (typu widok ekranu, wybór języka interfejsu), zapamiętanie zalogowania. Korzystanie z serwisu Infona oznacza zgodę na zapis informacji i ich wykorzystanie dla celów korzytania z serwisu. Więcej informacji można znaleźć w Polityce prywatności oraz Regulaminie serwisu. Zamknięcie tego okienka potwierdza zapoznanie się z informacją o plikach cookies, akceptację polityki prywatności i regulaminu oraz sposobu wykorzystywania plików cookies w serwisie. Możesz zmienić ustawienia obsługi cookies w swojej przeglądarce.
Gene-phenotype association prediction can be applied to reveal the inherited basis of human diseases and help drug development. Gene-phenotype associations are related to complex biological process and influenced by various factors, such as relationship between phenotypes and that among genes. While due to sparseness of curated gene-phenotype associations, existing approaches are limited to prediction...
This research retrieved surface net radiation using meteorological data and Landsat 5 TM images of the four seasons in the year 2009. Meanwhile the 65 different landscape metrics of each analysis unit were acquired using landscape analysis method. Then the most effective landscape metrics which could affect surface net radiation were determined by correlation analysis, stepwise regression, etc. The...
Taking Xiamen city as the study area, we investigated the cool island effects of urban green open spaces, including forest, farmland and water body, with a multi-temporal methodology. A summer series of Landsat TM/ETM+ images were used here, from 1987 to 2009 in the process of urbanization. Both area and shape index of those green open space patches were examined in their relationships with the cool...
Nanosecond pulsed electric fields (nsPEFs) is a novel non-thermal technology to induce a series of medical and biological effects. It has been proven effective in tumor shrinkage, but few studies focus on its radiosensitization in oral tongue squamous cell carcinoma. The purposes of this study were to evaluate the radiosensitization effect of nsPEFs, alone or combined with radiation, on human oral...
In order to meet the explosive traffic demand, the capacity of Long Term Evolution(LTE) system needs to be further expanded, and one choice is to integrate unlicensed carrier into the overall LTE system. However, unlicensed band might be shared by other communication systems like Wi-Fi and radar, so the available bandwidth for each user could not be guaranteed. We propose a carrier aggregation resource...
Realistic power amplifier (PA) model plays a very important role in the energy efficiency analysis for relay system, since it takes up to 70% of the total power consumption. In this paper, we aim to investigate the impact of non-ideal PA on the optimal relay deployment for two-way relay system using amplify forward or decode forward protocol in comparison with that of ideal PA. In the two-way relay...
In this study, Sn-0.7Cu solder alloy, being selected as the research object, was allowed to react with polycrystalline Cu substrate at 250°C, 275°C and 300°C. After soldering reaction of 10 minutes, it underwent cooling in the three types of cooling medium: water, air and heating furnace, along with the simultaneous application of high pressure air for blowing away the liquid solder on the top of...
Existing typical algorithms of string matching are too difficult for taking advantage of multicore platforms. OpenMP (Open Multi-Processing) supports multiprocessing application programming interface with shared memory. We introduce a parallel Aho-Corasick algorithm based on OpenMP for shared memory, which exploits the non-deterministic finite automaton with space efficient for larger patterns. The...
This paper describes a method for analyzing tonality and transcribing melody stream automatically. Tonality plays the core part in organizing music structure. By making an investigation into cognition and musicology, we propose an approach to transcribe major component of polyphonic music from the point of view of tonality. Our method focuses on music cognition instead of signal processing. Basing...
With the advent of lead-free soldering electronic packaging industry, there are growing concerns regarding the problems of voids in lead-free solder joints. Many researchers are eager to understand the growth, evolution and control factors of bubbles. Due to the restrictions in test conditions imposed by high temperature and opacity of soldering, one cannot directly observe and analyze the behaviour...
Interfacial intermetallic compound (IMC) is a necessary condition for the reliability of solder connection. In this study, the fiber lasers were used to solder rapidly-solidified lead-free solder Sn3.5Ag0.7Cu and Cu substrate, investigating the influence of laser soldering process parameters on the growth of IMC at the solid/liquid interface and finding the optimum parameters of laser soldering process...
As soldering process is a high temperature phenomenon accompanied by surface reaction kinetics, the computational model for solder bubble growth can be a strong arena for describing those aspects which are otherwise difficult to be understood through the experimental methods. In this paper, the growth of gaseous bubbles in the molten tin solder has been modeled using finite element method. The advection-diffusion...
The appearance of IMCs on the Sn/Cu interface plays an important role in the joint reliability. Their growth behavior during solidification of multiple reflows was investigated. Compressed air was employed to blow away the residual liquid solder immediately after heating preservation so that the morphology corresponding to heating preservation would remain unaltered; and then by compared they with...
As soldering process is a high temperature phenomenon accompanied by surface reaction kinetics, the computational model for solder bubble growth can be a strong arena for describing those aspects which are otherwise difficult to be understood through the experimental methods. In this paper, the growth of gaseous bubbles in the molten tin solder has been modeled using finite element method. The advection-diffusion...
With the advent of lead-free soldering electronic packaging industry, there are growing concerns regarding the problems of voids in lead-free solder joints. Many researchers are eager to understand the growth, evolution and control factors of bubbles. Due to the restrictions in test conditions imposed by high temperature and opacity of soldering, one cannot directly observe and analyze the behaviour...
Interfacial intermetallic compound (IMC) is a necessary condition for the reliability of solder connection. In this study, the fiber lasers were used to solder rapidly-solidified lead-free solder Sn3.5Ag0.7Cu and Cu substrate, investigating the influence of laser soldering process parameters on the growth of IMC at the solid/liquid interface and finding the optimum parameters of laser soldering process...
The appearance of IMCs on the Sn/Cu interface plays an important role in the joint reliability. Their growth behavior during solidification of multiple reflows was investigated. Compressed air was employed to blow away the residual liquid solder immediately after heating preservation so that the morphology corresponding to heating preservation would remain unaltered; and then by compared they with...
The chaotic cryptosystems are widely researched in the scientific and technical fields. But the dynamical degradation is a hindrance to digital chaotic maps. In this paper, we present a detailed statistical analysis of the mixed chaotic series based on the logistic map and Fibonacci sequence, which convert the value of the logistic map into the integer number by Fibonacci sequence. The experimental...
The effect of the fiber laser soldering parameters, laser-soldering output power and laser-soldering scanning speed, respectively, on the Sn-Ag-Cu/Cu interfacial reaction was investigated in this paper. When the output energy was very low, the Cu6Sn5 IMC was in scallop type with smooth surface; as the energy increased, the Cu6Sn5 grains showed the morphology of scallop type grains with faceted surface;...
The multicore structure has been mainstreamed. The paper introduces a parallel chaos-based encryption approach in order to take advantage of the multicore processor. The chaotic cryptosystem is based on the logistic map. The parallel algorithm is designed with the shared memory model of the OpenMP. The experimental results show that the chaotic cryptosystem demonstrates the good statistical properties,...
Podaj zakres dat dla filtrowania wyświetlonych wyników. Możesz podać datę początkową, końcową lub obie daty. Daty możesz wpisać ręcznie lub wybrać za pomocą kalendarza.